OUR STAFF
Board Certified Physicians, the highest quality comprehensive care
Our doctors are uniquely trained in both Internal Medicine and Pediatrics. They are specialists for both children and adults. They are dedicated to providing the most complete, detailed, and personable care to family members of all ages, including newborns, children, teens and adults.
Dr. Jessica Brooks Anderson
MD
Dr. Jessica Brooks Anderson grew up in Bastrop, Texas, a small town outside of Austin. She attended Texas A&M University and graduated with a Bachelor of Science cum laude in Biochemistry and Genetics. She also received University and Foundation Honors and was recognized with the Margaret Rudder Award for community service. Dr. Anderson completed medical school in Galveston at the University of Texas Medical Branch and received the Tanya Johnson Memorial Award for service to children. She remained at UTMB for her residency training in Internal Medicine and Pediatrics, which she chose as a result of her love of continuity of care. “I truly enjoy the ability to serve all members of the family and promote their health with knowledge of medical issues spanning the spectrum of life from newborns to the elderly.” Dr. Anderson served as the Internal Medicine-Pediatrics Chief Resident in her final year of residency and then joined Cypress Physicians Association in the fall of 2008. “I consider myself to be a very good listener, and I pride myself on taking time with my patients. I find it a privilege to know my patients and their families on very personal level.”
In her spare time Dr. Anderson enjoys spending time with her young son. She also likes to volunteer, cook, travel, and participate in sports, including running, golf, and skiing. She is a member of St. Dunstan’s Episcopal Church, where she teaches youth Sunday School and helps coordinate and participate in annual medical mission trips to La Romana, Dominican Republic
Dr. Glenn Davis
MD
Dr Davis is Co-Founder of Cypress Physicians Association. He is Board Certified in Internal Medicine and Pediatrics.
Dr Davis graduated Magna Cum Laude in Biochemistry from Texas A & M University. He received his MD from Baylor College of Medicine where he graduated in the top quarter of his class.
He completed his residency in Internal Medicine/Pediatrics at Baylor College of Medicine. During his last year, he was Chief Resident for the combined Internal Medicine/Pedriatric residency program at Baylor College of Medicine.
In 2001, Dr Davis began his practice with MacGregor Medical Association at its Willowbrook location. In nine months he became the clinic’s Senior Physician as well as Director of its Inpatient Services at Methodist Willowbrook Hospital.
Next, in 2002 Dr Davis Co-founded Cypress Physicians Association, a comprehensive Primary Care medical clinic that serves families throughout Northwest Houston. Cypress Physicians Association now has three convenient locations in the area.
Dr Davis was awarded Methodist Willowbrook Physician of the year in 2007 and 2008. In 2009 he was named one of Americas top doctors by the Consumer Research Council. In 2010 he was named to the prestigious Aggie 100 honoring the most rapidly growing Aggie owned businesses in the world.
Dr Davis currently sees patients at each of his offices.
Dr. Kathryn F. Ziegler
MD
Dr. Kathryn Ziegler majored in Biomedical Engineering and graduated Summe cum Laude from Texas A&M University in 1998. She attended Baylor College of Medicine, where she was a member of the Texas Academy of Internal Medicine Preceptorship Program and a Mentor in the Peer Resource Network.
After graduating from her medical program in 2003, Dr. Ziegler stayed at Baylor College of Medicine to complete her residency in Internal Medicine and Pediatrics. During that time, she became the Chief Resident of Internal Medicine-Pediatrics, a member of the Pediatrics Residency Curriculum Committee, and a Mentor for the Internal Medicine Resident’s Assistance Program.
Dr. Ziegler has received honorary recognition from many sources, including Texas A&M University Honors and several Letters of Commendation from Texas Children’s Hospital. She is volunteer Board Member of the Community of the Streets, and she was a Resident Advisor for the Reach out and Read program based out of Martin Luther King Health. She is also a member of the American Academy of Pediatrics and the American College of Physicians.
Dr. Ziegler joined Cypress Physicians Association in August 2007 and considers it a great joy to treat patients from infants to elderly.
Dr. Zielger enjoys time cooking and camping with her husband and children. She and her family are active members of Trinity Espiscopal Church in mid-town Houston. Dr. Ziegler enjoys teaching Sunday school to elementary children.
Dr. Christina St. Michel
MD
Dr. Christina St. Michel joined Cypress Physicians in 2018. She is Board Certified in Family Medicine. She graduated with a degree in Biology at MIT in 1999. She attended Baylor College of Medicine and graduated 2003. She completed her residency in Family Medicine in 2006 with Memorial Family Medicine in Houston where she served as Chief Resident in her final year.
Dr St. Michel worked as a hospitalist at Memorial Hermann and then spent several years as an Assistant Professor teaching at Baylor College of Medicine. She spent three years as a missionary in South Sudan prior to joining Cypress Physicians and is pursuing her Masters in International Health.
Dr. Sharon McGrath
MD
Dr. Sharon McGrath grew up in Austin, TX. Her father took her on many budget adventures around the world at a young age, which inspired her interest in family medicine and desire to provide comprehensive care.
While completing undergrad in California, she met her future husband through an online gaming community. She returned to Texas for medical school in Lubbock and the Permian Basin out in west Texas. She married her husband after medical school, and their first daughter was born in Fort Worth during residency. She moved north of Houston in 2018 to be closer to family. Her son was born in summer 2019. She joined Cypress Physicians Association in 2020.
Her specific interests are women’s health and mental health. Outside of medicine, she enjoys travel, trying unique cuisines, board games, sci-fi and fantasy books, and spending time with family and being a mom.
Dr. Sharon McGrath is Board Certified in Family Medicine by the American Board of Family Medicine.
Education
John Peter Smith Family Medicine Residency in Fort Worth, TX Texas Tech University Health Sciences Center School of Medicine in Lubbock, TX Bachelor of Arts in Biology at Pomona College in Claremont, CA
Jacklyn Eyre, PA-C
Physicians Assistant
Meet Jacklyn Eyre, a dedicated and highly skilled Physician Assistant with a passion for healthcare and aesthetics. She embarked on her academic journey at Texas Tech University, graduating with honors with a Bachelor of Science in Biochemistry and Molecular Biology. Continuing her pursuit of excellence, she obtained her Master’s degree in Physician Assistant Studies from the prestigious University of Texas Medical Branch.
Certified by the National Commission on Certification of Physician Assistants, Jacklyn has honed her expertise over the years. Her valuable experience includes working at the University of Texas Health Science Center before finding her place at Cypress Physicians Association, where she currently serves patients with utmost care and dedication.
While her professional focus revolves around all aspects of primary care, Jacklyn has a particular interest in aesthetics. Her patients benefit from her expertise, enhancing their well-being and confidence.
Beyond her professional life, Jacklyn cherishes the time spent with her beloved family, finding balance through regular workouts, and indulging in memorable vacations, especially in Canada. With her compassionate approach and passion for her patients, Jacklyn continues to make a positive impact on her patients’ lives.
Melinda Guerry, PA-C
Physicians Assistant
Melinda Guerry has joined our group at our North Cypress location. She attended the University of Texas Medical Branch at Galveston for her Masters of Physician Assistant Studies. Melinda also attended the University of Nebraska – Lincoln where she graduated magna cum laude in Chemical Engineering.
Lindsey Lowe, PA
Physician Assistant
Lindsey Lowe has joined our group as a Physician Assistant at our Spring Woods location and is able to provide care to the whole family.
A central Texas native, she obtained her Masters of Physician Assistant Studies from The University of Findlay in Ohio after graduating Magna Cum Laude from Texas Tech with her bachelor’s degree in exercise sports science. She loves to spend her spare time outdoors, trying new restaurants, or playing with her beloved Weimaraner, Wrigley. She is excited to be a part of CPA!
Ludmila Howser, PA
Physician Assistant
Ludmila Howser is an experienced, dedicated Physician Assistant with extensive experience in a variety of medical fields. Compassionate professional with outstanding clinical and interpersonal skills.
Ludmila graduated from the State Medical and Pharmaceutical University named after Nicolae Testimitianu, Moldova (former USSR). Prior to her relocation to the U.S., she worked as an OB/GYN. Many years in the medical field made her to decide, unequivocally, that Family Medicine is the best match for her vocational goals and personality, where she can combine her educational and professional experience and take care of whole family.
Ms. Howser completed the Physician Assistants Master’s Program at University of Texas PA. She enjoys interacting with a variety of patients, from a range of economic, social and cultural backgrounds, and featuring a wide range of conditions and all age groups. Her goal is to provide compassionate care with the clinical application of modern technologies, as well as warmth and sensitivity towards her patients and colleagues.
Clinical Interests
Woman’s health, Geriatrics, Diabetes, Hypertension, she really believes that the preventative care is very important.
Sarah Duban, PA
Physician Assistant
Sarah Duban has joined our Spring Woods location. She obtained her Masters of Physician Assistant Studies from the University of Texas Medical Branch in Galveston, TX. She has experience in several fields, starting her career in emergency medicine in Houston as well as family medicine at Baylor College of Medicine. In addition, she has a significant background in gastroenterology, gaining experience in gastrointestinal oncology at MD Anderson Cancer Center as well as interventional gastroenterology at UT Health in Greater Heights, TX. In addition to providing primary care services, she enjoys providing care relating to nutrition and gut health.
Sarah resides in The Woodlands and in her spare time, she enjoys spending time with her husband and three children.
Ellen Mercado, PAC
Physician Assistant
Ellen received a BS in nutritional sciences from the University of Texas at Austin (hook ’em!) and her Masters in Physician Assistant studies from Baylor College of Medicine. Her background is in vascular medicine as well as aesthetics. She has a passion for patient education and helping patients feel better, inside and out. In her free time Ellen enjoys spending time with her two kids and anything outdoors. She is glad to be part of the CPA team!